Fan Controller fan and filter

[Tornad2020]

Hi i have recently received a tornado 4250m3 box fan which is to powerful for my needs so i have been looking at 7amp smscom twin fan controller just wondering would i be right in saying if the fan was set at a certain maximum percentage on the controller the air-movement would be:
90%(4250-425)=3825m3
80%(4250-850)=3400m3
70%(4250-1275)=2975m3

I am looking looking at the carboair100 10inchx660 3800m3 filter i know id never run at 100% speed

Would this be around about correct? I am need answers before buy the rest of the equipment based on this thanks

 

[Renfro]

tornado 4250cm3 box fan

Not really sure what type blower that is. You have any pics?

Ducted airflow isn't a linear thing due to static pressure (friction) losses.

 

[Tornad2020]

10 inch one of these it is

 

[Tornad2020]

I put cm3 by mistake not m3 but changed it now

 

[Renfro]

I don't really trust those flow numbers, they seem pretty high. I would be surprised if when ducted and in use if the max speed only provided around 1300 - 1400 m3/hr.

Look into a centrifugal style blower, like a Vortex VTX series.

 

[Renfro]

I put cm3 by mistake not m3 but changed it now

I assumed it was an error.

 

[Tornad2020]

I don't really trust those flow numbers, they seem pretty high. I would be surprised if when ducted and in use if the max speed only provided around 1300 - 1400 m3/hr.

Look into a centrifugal style blower, like a Vortex VTX series.

I have a 10inch hyperfan at the moment but doesn't seem to be upto the job

 

[Renfro]

Pretty sure a hyperfan is mixed flow (garbage). Got a pic?

Whats your ducting like? You using accordion duct with bends? That kills flow.

 

[Renfro]

The box fan will perform a lot better versus friction losses compared to the mixed flow. Centrifugal designs handle the static pressure losses much better than a mixed flow (CFM drops off fast with mixed flow). Worst by far is axial designs, they are more of a duct restrictor.

 

[Tornad2020]

It says there it ment to move 1800m3 basically

 

[Renfro]

It says there it ment to move 1800m3 basically

With no ducting. lol they fall off fast when ducted.

Whats your ducting look like? Neat, straight and smooth walled?

This is the style that works well:

Amazon.com : Vortex Powerfans VTX1000 Vortex 790 CFM Powerfan, 10 inch with Ventech Fan Speed Controller : Bathroom Fans : Garden & Outdoor

Amazon.com : Vortex Powerfans VTX1000 Vortex 790 CFM Powerfan, 10 inch with Ventech Fan Speed Controller : Bathroom Fans : Garden & Outdoor

www.amazon.com

 

[Tornad2020]

i do have a single bend in about 3m duct then that about it reallythe fans connected directly to the filter

 

[Renfro]

It says there it ment to move 1800m3 basically

This is a garbage mixed flow fan, the only way you get anywhere near those numbers is without any duct work.

 

[Tornad2020]

What about isomax fan they any good?

 

[Renfro]

What about isomax fan they any good?

Im in the US, any fan you want me to look at you need to send me a link or a pic. We have different brands. Is it centrifugal?

 

[Tornad2020]

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[Tornad2020]

id say the 10inch 2350m3 version

 

[Renfro]

Thats another mixed flow design.

 

[Renfro]

Still haven't shown your ducting

 

[Tornad2020]

I cant get a picture of the ducting its in another place from me but its 10inc acoustic ducting about 3m long with a 90 degree bend possibly abit tight where goes through the ceiling but this will be getting fixed erm a do know the type of fan you're on about but there alway very low m3 number so i worry they wont do the job